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Old 3rd Aug 2022, 6:14 pm   #4
Graham G3ZVT
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Join Date: May 2010
Location: Greater Manchester, UK.
Posts: 18,711
Default Re: Band 1 Rod Pentode modulator (Part 2)

I am a great fan of minimalist design and this project ticks that particular box.

Are you going to build a matching sound modulator, I don't suppose you have found a cheap source of suitable crystals?


The rod pentodes aren't radially available at the minute for obvious reasons.


I've been trying (quite hard!) to get Vidblaster v5 (v5.54) going for our purposes. Why? Because it has a nice built-in sound mixer that can be configured to follow the selected video source.

The problem is, as you know, the video needs s t r e t c h i n g to 16:9 in order to get the correct aspect ratio on 405, and v5 does not have the convenient 1.33:1 / 1.78:1 switching in the GUI's sources modules.

In actual fact, you can force a still-store to 1.78 by altering the aspect ratio parameter of the relevant source in your [profile name].ini file, this works a treat for still-stores but seems to be ignored for "player" modules. Quite infuriating!

Of course I could re-render all my videos, but I'd rather not.
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